body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    line-height: 1.6;
}

.container {
    background-color: #f5f5f5;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    margin: 10px 0;
}

button:hover {
    background-color: #45a049;
}

button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

#fileList {
    margin-top: 20px;
    border: 1px solid #ddd;
    padding: 10px;
    border-radius: 4px;
    max-height: 300px;
    overflow-y: auto;
}

.file-item {
    padding: 8px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
}

.file-item:last-child {
    border-bottom: none;
}

.rename-options {
    margin-top: 20px;
    padding: 15px;
    background-color: #e9e9e9;
    border-radius: 4px;
}

input, select {
    padding: 8px;
    margin: 5px 0;
    width: 100%;
    box-sizing: border-box;
}

.status {
    margin-top: 20px;
    padding: 10px;
    border-radius: 4px;
}

.success {
    background-color: #dff0d8;
    color: #3c763d;
}

.error {
    background-color: #f2dede;
    color: #a94442;
}